Across
- 9. An inherited trait that increases an organisms chance of surviving and reproducing in its environment
- 10. The resemblance of one species to another species
- 11. The change over time in populations of related organisms
- 12. Are body parts that have lost their original function through evolution
- 13. The impression of an organism in a rock
- 14. The science of the development of embryos from fertilization to birth
- 15. An adaptation that enables a species to blend in with its environment
Down
- 1. breeding The breeding of organisms for desired characteristics
- 2. A chart that divides Earths history into different time units
- 3. selection The process by which populations of organisms with variations that help them survive in their environment live longer
- 4. The study of similarities and differences among structures of living species
- 5. is made up of all the fossils ever discovered on Earth
- 6. fossil is the preserved evidence of the activity of an organism
- 7. A slight difference in an inherited trait of individual members of a species
- 8. A fossil copy of an organism in a rock